RCW 81.60.040: Duties.

Every police officer commissioned under the provisions of RCW 81.60.010 through 81.60.060 shall when on duty have the power and authority conferred by law on peace officers, but shall exercise such power only in the protection of the property belonging to or under the control of the corporation at whose instance the officer is commissioned and in preventing, and making arrest for, violations of law upon or in connection with such property.